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为了研究不同产状侵入岩浆岩对煤层的热力影响规律及热变质作用,采用理论分析、数值模拟和实验室试验验证的方法,构建了岩浆侵入煤系地层后热传导作用的数学模型,并以试验矿井连续选取煤样的多元物性参数测定结果为研究对象,探讨了不同产状侵入岩浆岩对煤层的热变质作用。结果表明:海孜煤矿岩床对下伏煤层热演化作用范围要大于大兴煤矿岩墙对煤层的热演化范围,且热力作用持续时间也比大兴煤矿岩床作用时间长;试验结果发现,不同产状的岩浆岩均表现出在煤体靠近岩浆岩时,最大镜质组反射率Romax有增加的趋势,通过模拟温度推算出的Romax与实测Romax较为接近;试验及现场实测瓦斯参数表明岩浆岩的侵入增加了煤层的突出危险性。
In order to study the thermal influence law and thermal metamorphism of different producing magmatic rocks on the coal seam, a mathematical model of heat conduction after magma intruded into the coal strata is established by theoretical analysis, numerical simulation and laboratory test. The results of multivariate physical parameters of continuous selection of coal samples in mines are taken as the research object, and the thermal metamorphism of different producing intrusive magmatic rocks to coal seams is discussed. The results show that the extent of the thermal evolution of the seam bed in Haizi coal mine is greater than that of the coal wall in Daxing coal mine, and the duration of thermal effect is longer than that of the bedrock in Daxing coal mine. The results show that, The magmatic rocks show that when the coal body is close to the magmatic rocks, the maximum vitrinite reflectance Romax tends to increase. The estimated Romax from the simulated temperature is closer to the measured Romax. The experimental and field measured gas parameters show that the magmatic rocks invade The prominent danger of the coal seam.